Naslov
Experimental Determination of Torsional Stiffness in Ribbed Bridge Deck

Autori
Grandić, Davor ; Štimac Grandić, Ivana ; Latić, Vildana

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Road and Rail Infrastructure / Lakušić, Stjepan - Zagreb : Građevinski fakultet Sveučilišta u Zagrebu, 2010, 489-494

ISBN
978-953-6272-37-2

Skup
First International Conference on Road and Rail Infrastructure - CETRA 2010

Mjesto i datum
Opatija, Hrvatska, 17.05.2010. - 18.05.2010

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
ribbed bridge decks; torsional stiffness reduction

Sažetak
A ribbed bridge decks will structurally behave as a grillage. A grillage has an efficient transverse load distribution, as well as transverse displacement distribution, due to transverse asymmetric load. In the case of bridge deck without diaphragms in the span, transverse load distribution depends on the torsional stiffness of longitudinal girders, diaphragms and deck slab. In standard bridge on-site testing, it is common to measure vertical displacements in the middle of the span and over the supports due to transverse symmetric and asymmetric static loading. A deflection in the middle of the span can be defined from the measured displacements in the middle of the span and over the supports. The results of the on-site testing on nine bridges were collected and used in this paper. The numerical results were calculated on three computational models which differ in torsional stiffness only for each single bridge. In this paper, experimental determination of torsional stiffness of bridge deck elements is carried out by using on site measured bridge deck deflection due to transversal asymmetric loading and adequate computational grillage models. Based on the conducted analyses, the coefficient of torsional stiffness reduction for verification of the serviceability limit state according to Annex C of EN 1990: 2000 is determined. The same coefficient is calculated using recommendation for torsional stiffness reduction in concrete elements defined by Model code CEB-FIP 1990 (MC 90). According to conducted analyses the design value of the coefficient of torsional stiffness reduction for verification of the serviceability limit state is proposed.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo

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